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[ GLSA 200704-01 ] Asterisk: Two SIP Denial of Service vulnerabilities
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PostPosted: Mon Apr 02, 2007 8:26 pm    Post subject: [ GLSA 200704-01 ] Asterisk: Two SIP Denial of Service vulne Reply with quote

Gentoo Linux Security Advisory

Title: Asterisk: Two SIP Denial of Service vulnerabilities (GLSA 200704-01)
Severity: normal
Exploitable: remote
Date: April 02, 2007
Bug(s): #171467
ID: 200704-01

Synopsis

Asterisk is vulnerable to two Denial of Service issues in the SIP channel.

Background

Asterisk is an open source implementation of a telephone private branch exchange (PBX).

Affected Packages

Package: net-misc/asterisk
Vulnerable: < 1.2.14-r2
Unaffected: >= 1.2.14-r2
Unaffected: >= 1.0.12-r2 < 1.0.13
Architectures: All supported architectures


Description

The Madynes research team at INRIA has discovered that Asterisk contains a null pointer dereferencing error in the SIP channel when handling INVITE messages. Furthermore qwerty1979 discovered that Asterisk 1.2.x fails to properly handle SIP responses with return code 0.

Impact

A remote attacker could cause an Asterisk server listening for SIP messages to crash by sending a specially crafted SIP message or answering with a 0 return code.

Workaround

There is no known workaround at this time.

Resolution

All Asterisk users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose net-misc/asterisk
Note: Asterisk 1.0.x is no longer supported upstream so users should consider upgrading to Asterisk 1.2.x.

References

CVE-2007-1561
CVE-2007-1594
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